"chastity is considered in the broad sense as “the successful integration of sexuality within the person and thus the inner unity of man in his bodily and spiritual being” (Catechism, No. 2337)."And I found this particularly interesting:

"What led John Paul II to his remarkable thesis that married love is nothing less than an icon of the self-giving love of the Blessed Trinity?

Dominican Father Jaroslaw Kupczak, who holds the chair of theological anthropology at the Pontifical Academy of Theology in Krakow, Poland, followed the trail back to the Second Vatican Council.

He noted that before the council, Karol Wojtyla’s writings on spousal love, such as Love and Responsibility, were primarily philosophical in nature.

It was only after the council that Wojtyla began to refer to the Trinitarian foundations of love between husband and wife.

The first time he expressly did so was in a 1974 article, “The Family as a Communion of Persons.” Father Kupczak did not hesitate to make the claim that Vatican II transformed Karol Wojtyla the philosopher into Wojtyla the theologian."